### Term **State Regulatory**  **Citation Definition** 



### Actual Construction **(already in SIP)** 7.54 m eans in general, initiation of physical on

- site construction activities of any facility subject to the requirements of 310 CMR 7.00, which are of a permanent nature. Such activities include, but are not limited to, installation of building supports and foundations, laying underground pipework and construction of permanent structures. 

### Adhesion Promoter 7.18 means a coating designed to facilitate the bonding of a primer or topcoat on surfaces such as trim moldings, door locks, and door sills, where sanding is impracticable, and on plastic parts and the edges of sanded areas. 

### Administrator 7.26(16), 7.27 means the administrator of the U.S. Environmental Protection Agency or his designee. 

### Alter or Alteration Throughout means any physical change or change in the method of operation (including modification or reconfiguration of an

emissions unit, change in the raw material used or change in the operating rate) which would result in an increase in potential emissions or an increase in ambient air impacts ( i.e ., reduced stack height). 

### Alternative Fuel 7.22, 7.45, 7.54 means any fu el designated as such on an annual list issued by the Department, including methanol, denatured ethanol, and other alcohols; mixtures containing 85% or more by volume of methanol, denatured ethanol, and other alcohols with gasoline or other fuels; natural gas; liquified petroleum gas; hydrogen, coal

- derived liquid fuels; fuels (other than alcohol) derived from biological materials; electricity (including electricity from solar energy); and any other fuel that the Department determines is substantially not p etroleum. 

### Alternative Fuel Vehicle 7.45 (MA

Green Fleet Program) means a motor vehicle as defined in M.G.L. c. 90, § 1,

which the Department determines to: (a) operate exclusively on an alternative fuel; and (b) meets applicable state and federal safety a nd emission standards. 

### Anti

- glare Safety Coating 7.18 means a low gloss coating formulated to eliminate glare for safety purposes on interior surfaces of a vehicle, as specified under the U.S. Department of Transportation Motor Vehicle Safety Standards. 

## Definitions submitted by

Massachusetts for Incorporation into the SIP

### Aqueous Cleaner 7.18 means a cleaning fluid or device using a cleaning fluid that is composed of soap and/or other water

- soluble materials in a water solution. 

### Asbestos 7.09, 7.15 means all asbestiform varieties of the mineral family called silicates including: serpentinite (chrysotile), riebeckite (crocidolite), cummingtonite

- grunerite

- (atmosite), anthophyllite, and actinolite

- tremolite. 

### Asbestos

containing Material 7.09, 7.15 means friable asbestos and any material containing 1% or more asbestos by area as determined by a laboratory using USEPA approved methods. This term includes but is not limited to sprayed

- on and troweled

- on materials applied to ceilings, walls, and ceilings, walls, and other surfaces, insulation on pipes, boilers, tanks, ducts, and other equipment, structural and non

- structural members, tiles, shingles or asbestos

- containing paper. 

### Automotive Refinishing Facility 7.18 means any facility at which the interior or exterior bodies of automobiles, motorcycles, trucks, mobile equipment, or

vans are re

- painted. This definition includes refinishing operations that travel to various locations, that refinish new vehicles damaged in transit before their initial sale, and
that refinish aftermarket vehicles. 

### Bakery 7.18(2a) means a facility consisting of one or more ovens for the baking of bread or other yeast leavened products. 

### Capture Efficiency 7.02, App B means the ability of a building, enclosure or system to capture air contaminants within the building, enclosure or
system before the air contaminants are directed to an air pollution control device. Capture efficiency is determined in accordance with EPA Reference Test Method Number 204, as specified in 40 CFR Part 51 Appendix M, or by other methods approved by the Department and EPA. 

### CEMS 7.08, 7.19 means a continuous emissions monitoring system

. 

### CFR Throughout means the Code of Federal Regulations.



### Com bined Cycle Com bustion Turbine 7.19 means any combustion turbine, including the duct burner portion thereof, in which heat is recovered from the exhaust gases to heat water or generate steam.


### Com pliance Certification Throughout means a statement detailing the compliance status of the

emission unit or facility in regards to each applicable requirement, signed by a responsible official of the facilityas being complete, accurate and true to the best knowledge of the signatory. 

### Construct or Construction Throughout means any physical change or change in the method of operation (including fabrication, erection, installation, demolition, or modification of an emissions unit) which would result in an increase in potential emissions. 

### Cooling Tower 7.02 as used in 310 CMR 7.02(2)(g)6. means, an open water recirculation device that uses fans or natural draft to draw or force ambient air through the device to cool warm water by direct contact. 

### Dry Bottom 7.19 means a furnace design in which the coal

- fired unit equipped with an ash disposal hopper bottom with sufficient co oling surface so that the ash particles impinging on the furnace walls or hopper bottom can be removed in a dry state. 

### Duct Burner 7.26, 7.32 means a device that combusts fuel and that is placed in the exhaust duct from another source, such as a stationar y gas turbine, internal combustion engine, kiln etc., to allow the firing of additional fuel to heat the exhaust gases before the exhaust gases enter a heat recovery steam generating unit. 

### Elastomeric Coating 7.18 means a coating that is designed for application over flexible parts, such as elastomeric bumpers.



### Emergency or Standby Engine 7.02, 7.03, 7.12,

7.26 for the purposes of 310 CMR 7.02(8)(i) and 7.03(10),

means any

stationary internal combustion engine which operates as an emergency or standby mechanical or electrical power source. A load shaving unit, peaking power production unit or a standby engine in an energy assistance program is not an emergency or standb y engine under this definition. 

### Emission Statement 7.12 is a certification submitted by the owner or operator of a facility that describes the actual annual emissions of VOC and/or NOx from the facility as well as the average Ozone Season daily emissions from the facility. 

### Energy Input Capacity 7.02(2),

7.04(2), 7.05, 7.06, 7.12, 7.19 means the ability of a fuel utilization facility, based on the

Higher Heating Value (HHV) of the fuel, to combust a stated maximum amount of fuel on a steady state basis, a s determined by the physical design and characteristics of the fuel utilization facility and does not include the energy input from preheated combustion air, recirculated fluegases, or exhaust gases from other sources.



### EPA Throughout means the United States Environmental Protection Agency. 

### Existing Facility 7.02, 7.26 for the purposes of 310 CMR 7.02(8), means any facility that is in operation on or before June 1, 1972, or any proposed facility of which the construction, substantial reconstruction or alteration of which has been approved in writing by the Department on or before June 1, 1972. All facilities as specified in the Federal Register, Volume 36, No. 247, December 23, 1971, the construction or modification of which was initiated after August 1 7, 1971 shall not be defined as existing facilities. 

### Face Firing 7.19 (?) means a furnace firing design in which the burners are mounted in an array on one or more vertical walls including (a) opposed firing, where the burners are mounted on two opposite walls; and (b) single

- wall firing, where the burners are mounted on only one wall. 

### Facility Throughout means any installation or establishment and associated equipment, located on the same, adjacent or contiguous property, capable of emissions; and for the purpose of 310 CMR 7.15, it means any structure, installation, building, equipment, or ship. 

### Federally Enforceable Throughout means all limitations and conditions which are enforceable by the Administrator, including but not limited to, those requirements developed pursuant to 40 CFR Part 60 (New Source Performance Standards), 40 CFR Part 61 (National Emission Standards for Hazardous Air Pollutants), 40 CFR Part 63 (National Emission Standards for Hazardous Air Pollutants for Source Catergories), 40 CF R P arts 72 through 80 (Acid Rain Program) and requirements within the Massachusetts State Implementation Plan. Federally enforceable requirements also include those requirements in operating permits issued either pursuant to 40 CFR part 71 or under 310 CMR 7.00: Appendix C, (except those listed as state enforceable only) any permit requirements established pursuant to 40 CFR52.21 (Prevention of significant deterioration of air quality), under plan approval requirements in either 310 CMR 7.02 or 310 CMR 7.0 0: Appendix A . Federally enforceable limitations and conditions can also be contained in either a permit restriction issued under 310 CMR 7.02(9), 7.02(10), 7.02(11) or equipment installed under 310 CMR 7.03, that has been made federally enforceable after the EPA has approved 310 CMR 7.02 and 7.03 into the Massachusetts SIP. 

### Federal Potential to Emit or Federal Potential Emissions 7.02 means the maximum capacity of a stationary source to

emit a regulated pollutant under its physical and operational design. Any physical or operational limitation on the capacity of the source to emit a regulated pollutant, including air pollution control equipment and restriction on hours of operation or on the type or amount of material combusted, stored, or processed, shall be treated as part of its design only if the limitation or the effect it would have on emissions is federally enforceable. To be federally enforceable, a limitation on any facility's capacity to emit a pollutant shall include testing, monitoring, and recordkeeping procedures sufficient to demonstrate compliance with the limitations. Examples of permit or SIP limitations generally considered federally enforceable are limitations on the allowable capacity of the equipment, requirements for the installation, operation and maintenance of pollution control equipment, limits on hours of operation, and restrictions on amounts of materials combusted, stored, or produced. To be federally enforceable, restrictions on operation, production, or

emissions must be stated in terms of the shortest averaging time that can be used as a practical matter, e.g. , pounds per hour, or gallons per hour, and they must be tied to other enforceable operating restrictions at the source. General limitations on potential
to emit, such as yearly limits ( e.g. , in tons per year), by themselves, are not considered federally enforceable. The use of hourly, daily, weekly, or monthly rolling limits are generally acceptable. Any federally enforceable limitations or conditions must be enforceable as a practical matter, ensure continuouscompliance with the restrictions, and include adequate testing, monitoring, and record keeping procedures sufficient to demonstrate compliance with the limitations or conditions of an applicable federal ly enforceable document described above. Fugitive emissions, to the
extent quantifiable, are included in determining the potential to emit of a stationary source. Secondary

emissions do not count in determining the potential to emit of a stationary source. 

### Ferrous Cupola Foundry 7.02 means a vertical cylindrical furnace using pig iron, scrap iron, scrap steel and coke as charging components. Ferrous Cupola Foundries can be separated into “Jobbing” Foundries and “Production” foundries. Jobbing foundries

run intermittently for just long enough at one time to pour the molds that are ready on the foundry floor on a job

-by job basis. Production foundries will melt metal continuously and pour to a succession of molds that are constantly being prepared to receive the flow of molten iron. 

### Four

- Stage Coating System 7.18(28) means a topcoat system composed of a colored basecoat, two semi

- transparent midcoats, and a final transparent clearcoat. For compliance purposes, the VOC content of four

- stage coating systems shall meet the

emission limitation for three or four stage topcoats in Table 7.18(28)(c), and is calculated according to the following formula:

Where:

VOC T4

- stage is the weighted average of the VOC content, as applied, in the basecoat, midcoat, and clearcoat
system.

VOCbc is the VOC content, as applied, of any given basecoat. VOCmc1 is the VOC content, as applied, of the first midcoat. VOCmc2 is the VOC content, as applied, of the second midcoat. 2VOCcc is twice the VOC content, as applied, of any
g iven clearcoat.VOC T4

- stage = (VOC bc + VOC mc1 + VOC mc2 + 2 VOC cc)

_____________________________________

5 

### Friable Asbestos

Containing Material 7.09 means any dry material containing 1% or more asbestos by area, as determined by a laboratory using USEPA approved methods, that hand pressure can crumble, pulverize, or reduce to powder.


### Fuel Cell 7.28, 7.32 means an electrochemical device that converts t he chemical energy in a fuel into electricity and heat. 

### Fugitive Emissions 7.03, 7.08, 7.54,

7.71, App A, B, C means those emissions which could not reasonably pass

through a stack, chimney, vent, or other functionally equivalent opening.


### Glass 7.19 means a hard amorphous inorganic substance made by fusing silicates, and sometimes borates and phosphates, with certain basic oxides. 

### Glass Melting Furnace 7.19(11) means equipment using heat for the production of glass. A unit comprising a refractory ves sel in which raw materials are charged, melted at high temperature, refined, and conditioned to produce molten glass. 

### Halogenated Organic Com pound 7.02, 7.03, 7.18 is any compound of carbon (excluding metallic carbides or carbonates and ammonium carbonate ) combined with a halogen. For purposes of 310 CMR 7.12 and 310 CMR 7.18, halogenated organic compounds (HOC) are the following specific chemicals: methylene chloride, perchloroethylene (tetrachloroethylene), CFC

- 11 (trichlorofluoromethane), CFC

- 12 (dichlorodifluoromethane), CFC

- 22 (chlorodifluoromethane), FC

- 23 (trifluoromethane), CFC

114 (dichlorotetrafluoro

- ethane), and CFC

- 115 (chloropentafluoroethane). 

### Hardener 7.18(28),7.25 means an additive designed to promote a faster cure of coatings which cure by chemical cross

- linking of the resin components. 

### Hazardous Air Pollutant (HAP 7.02, 7.03, 7.12,

7.26, 7.38, App B means an air contaminant designated by EPA under

42 U.S.C. 7412, as modified by EPA in 40 CFR Part 63, Subpart C (40 CFR 63.60 through .69). That list is incorporated by reference herein, together with all

amendments and supplements thereto. A copy of the list is available from the Department.

### Heat Release

Rate 7.19(4) means the steam generating unit design heat input capacity (in Btu per hour) divided by the furnace volume (in cubic feet); the furnace volume is that volume bounded by the front furnace wall where the burner is located the furnace side waterwall, and extending to the level just below or in front of the first row of conve ction pass tubes. 

### Im pact Resistant Coating 7.18 means a coating designed to resist chipping caused by road debris.



### Lean Burn Engine 7.19 means a stationary reciprocating internal combustion engine in which the amount of O2 in the engine exhaust gases is 1.0% or more. 

### Lo west Ac hievable Emission Rate (LAER) App A means, for any source, the more stringent rate of emissions based on the following:

(a) The most stringent emissions limitation which is contained in any state SIP for such class or category of stationary source, unless the owner or operator of the proposed stationary source demonstrates that such limitations are not achievable; or

(b) The most stringent emissions limitation which is achieved in practice by such class or category of stationary source. This limitation, when applied to a modification, means the lowest achievable emissions rate for the new or modified emissions units within a stationary source. In no event shall LAER allow a proposed new or modified stationary source to emit any p ollutant in excess of the

amount allowable pursuant to applicable New Source Performance Standards of 40 CFR Part 60. 

### Malfunction 7.08, 7.24, 7.40 means any sudden, infrequent, and not reasonably preventable failure of air pollution control and monitoring equipment, process equipment, or a process to operate in a normal or usual manner. Failures that are caused in part by poor maintenance or careless operation are not malfunctions. 

### Maximum Ac hievable Control 7.02, 7.12, 7.26,

7.40, App B means the standard established by the Administrator

pursuant to the Clean Air Act, §§ 112 and 129 (42 U.S.C. 7412 and 42 U.S.C. 7429), that represents the maximum degree of reduction in emissions of hazardous air

### Technology pollutants determined, after examination of econo mics, health, and environmental impacts, to be achievable for new or existing sources in the category or sub

- category to which the emission standard applies. MACT Standards may be determined by the Department pursuant to 40 CFR 63 Subpart B. 

### Maximum Design Capacity 7.02 means the rated design capacity, operating rate or production rate of an emission unit as determined by the manufacturer of that unit or other method approved by the Department. 

### Mobile Equipment App C, and in

the def of automotive refinishing means, for the purposes of 310 CMR 7.18(28), any

equipment that is physically capable of being driven or drawn upon a highway including but not limited to construction vehicles (such as mobile cranes, bulldozers and concrete mixers); farming equipment (such as tractors and plows); hauling equipment (such as truck trailers, utility bodies and camper shells) and miscellaneous equipment (such as street sweepers and golf carts). 

### MW 7.08, 7.26, 7.27,

7.28, 7.32, 7.33, 7.70 means megawatt or a unit of electrical power equal to one

million watts.



### Natural Draft Opening Definitions only means any permanent opening in an enclosure that remains open during operation of the emission unit and is not connected to a duct in which a fan is installed. 

### Nonattainment Area App A means an area designated by the EPA as not meeting the National Ambient Air Quality Standard for a criteria pollutant pursuant to the Clean Air Act, § 107 (42 U.S.C. 7407) and 40 CFR Part 81. The current Massachusetts attainment status is published at 40 CFR 81.322, Subpart C

- Section 107 Attainment Status Designations. 

### Nonattainment Revie w 7.02, 7.26, 7.27,

7.28, 7.29, App A is plan review for major sources and major modifications

as defined and described in 310 CMR 7.00: Appendi x A

.



### Non

- Criteria Pollutant 7.02 is any air contaminant that is not listed as a criteria pollutant.


### Non

- road Vehicle 7.45 (MA

Green Fleet program) means any motor vehicle and equipment which is not

primarily designed or intended for operation on public roadways to provide transportation.


### Potential Throughout means the maximum capacity of a facility or a stationary

### Emissions or

Potential To Emit source to emit any air contaminant or pollutant under its physical and operational design. Any physical or
operational limitation on the capacity of the facility or stationary source to emit any air contaminant or pollutant, including air pollution control equipment and/or restrictions on hours of operation, or on the type or amount of material combusted, stored o r processed, shall be treated as part of the design only if the limitation is specifically stated in the facility's or stationary source's plan approval(s), approved emission control plan(s), operating permit, certification(s), restricted emission status, notification(s) and applicable regulations, or in the case of de minimis sources, in records established and maintained at the facility or stationary source pursuant to 310 CMR 7.02(2)(b). Fugitive emissions, to the extent quantifiable, are included in det ermining the potential

emissions or the potential to emit of a facility or stationary source; secondary emissions are not included. 

### Pretreatment Wash Premier 7.18(28) means the first coat applied to bare metal if solvent

- based primers will be applied. This coating contains a minimum of 0.5% acid by weight, is necessary to provide surface etching, and is applied directly to bare metal surfaces to provide corrosion resistance. 

### Primer Sealer 7.18(28) means a coating that improves the adhesion of the topco at, provides corrosion resistance, promotes color uniformity, and resists penetration by the topcoat. 

### Primer Surfacer 7.18(28) means a coating that fills in surface imperfections and builds a film thickness in order to allow sanding.



### Reducer 7.26, 7.18(28) means a solvent added to dilute a coating, usually for the purpose of lowering its viscosity. 

### Regenerative Cycle Com bustion Turbines 7.19 means any stationary combustion turbine which recovers heat from the combustion turbine exhaust gases to preheat the inlet combustion air to the combustion turbine.



### Repowering 7.19 means the replacement of an emission unit with a new unit that is less polluting and more efficient than the unit which is being replaced. 

### Rich Burn Engine 7.19 means any station ary reciprocating internal combustion engine that is not a lean burn engine.

### Simple Cycle

Com bustion Turbine 7.19 means any stationary combustion turbine which does not recover heat from the combustion turbine exhaust gases to heat water or generate steam. 

### Single

- stage Topcoat 7.18 means a topcoat consisting of only one coating.



### Soap 7.18, 7.25 means cleansing agents made of the alkali metal salts of fatty acids having from ten to 18 carbon atoms. 

### Specialty Coating 7.25, 7.18(28) means a product which is necessary due to unusual job performance requirements. These coatings or additives include, but are not limited to, adhesion promoters, uniform finish blenders, elastomeric materials, impact resistant coatings, underbody coatings, weld through primers, gloss flatteners, bright metal trim repair, and anti

glare/safety coatings. 

### Stationary Com bustion Turbine 7.19 means any stationary internal combustion engine which operates with a rotary motion, including any simple
cycle turbine, regenerative cycle turbine, or any turbine portion of a combined cycle steam/electric generating
system that is not self propelled. 

### Stationary Reciprocating Internal Com bustion Engine 7.12, 7.18, 7.19,

7.26 means any reciprocating internal combustion engine. It

does not include an engine that is regulated by EPA

as a non

- road engine pursuant to 42 U.S.C. 7543(e) and 42 U.S.C. 7547(e) or is self

- propelled.



### Stencil Coating 7.18 means an ink or pigmented coating which is rolled or brushed onto a template or stamp in order to add identifying letters, symbols, or numbers to motor vehicles,

or their parts or components. 

### Stoker 7.19 means a boiler/furnace design that incorporates a feeding mechanism, fuel distribution and ash residue collection
system for the purpose of introducing solid fuel into the combustion zone of the boiler/furnace by feeding the fuel onto a grate. 

### Surface Preparation Product 7.02, 7.03,

7.18(28) means a product formulated to dissolve and remove tar,

grease, wax, and other hydrophobic contaminants from a surface prior to application of a primer. 

### Tangential Firing 7.19 means a furnace firing design where the burners are mounted at the corners of the furnace chamber.

### Three

- Stage

Coating System 7.18(28) means a topcoat system composed of a colored b asecoat, a semi

- transparent midcoat, and a final transparent clearcoat. For compliance purposes, the VOC content of three

- stage coating systems shall meet the emission limitation for topcoats in Table 7.18(28)(c), and is calculated according to the following formula:

VOC T 3

- stage = (VOC bc + VOC mc + VOC cc)

________________________

4 Where:

VOC T3

- stage is the weighted average of the VOC content, as applied, in the basecoat, midcoat, and clearcoat
system.

VOC bc is the VOC content, as applied, of any given basecoat.

VOC mc is the VOC content, as applied, of any given midcoat.

2VOC cc is twice the VOC content, as applied, of any given clearcoat. 

### Touch

-up Coating 7.18 means a coating applied by brush, airbrush, or non

refillable aerosol can of no more than eight ounces to cover minor surface damage and imperfections. 

### Two

- stage Topcoat 7.18(28) means a basecoat/clearcoat system composed of a colored basecoat and a transparent final coat. For compliance purposes, the VOC content of basecoat/clearcoat
systems shall meet the emission limitation for two

- stage topcoats in Table 7.18(28)(c), and shall be calculated according to the following formula:

VOC T bc/cc = VOC bc + 2 VOC cc

_______________ 3 Where: VOC T bc/cc is the weighted average of the VOC content, as applied, in the basecoat (bc) and clearcoat (cc) system. VOC bc is the VOC content, as applied, of any givenbasecoat. 2VOC cc is twice the VOC content, as applied, of any given clearcoat. 

### Underbody Coating 7.18 means a coating designed for protection and sound deadening that is typically applied to the wheel wells and underbody of an automobile.



### Uniform Finish Blender 7.18 means a coating designed to blend a repaired topcoat into

an existing topcoat.


### VOC Composite Partial Pressure 7.03, 7.18, 7.26 means the sum of the partial pressures of the compounds defined as VOC. VOC Composite Partial Pressure is calculated as follows:

Where: Wi = Weight of the "i"th VOC compound, in grams Ww = Weight of water, in grams We = Weight of exempt compounds, in grams Mwi = Molecular weight of the "i"th VOC compound, in
g

- mole Mww = Molecular weight of water, in g

- mole Mwe = Molecular weight of exempt compound, in g

- mole PPc= VOC composite partial pressure, in mm Hg VPi = Vapor pressure of the "i"th compound, in mm Hg n = The number of VOC compounds 

### Water Hold

- out Coating Definitions only means a coating applied to the interior cavity areas of doors, q uarter panels, and rocker panels for the purpose of corrosion resistance to prolonged water exposure. 

### Weld

- through Primer Definitions only means a primer that is applied to an area before welding is performed, and that provides corrosion resistance to the surface after welding has been performed.